A nurse is caring for a client who is 1 day postoperative following an open thoracotomy. The client is receiving oxygen mist at 40% by face tent. The client's SPO2 is 89-96%. ABG results are: pH 7.31, PaO2 93 mm Hg, PCO2 5O mm Hg, HCO3 25 mEq/L. Which of the following is an appropriate action by the nurse?
Position the client prone and have the respiratory therapist perform postural drainage.
Place the client in high-Fowler's position and encourage the use of incentive spirometer and coughing.
Increase oxygen to 70%.
Switch oxygen to a nonrebreather mask.
The Correct Answer is B
A. Prone positioning and postural drainage are typically not appropriate interventions for a client 1 day postoperative following an open thoracotomy, as this could place stress on the incision site and cause discomfort or injury.
B. High-Fowler's position facilitates lung expansion, which can improve ventilation and oxygenation. Encouraging the use of an incentive spirometer and promoting coughing helps clear secretions and expand the lungs, addressing the mild respiratory acidosis indicated by the ABG results (pH 7.31 and PaCO2 50 mm Hg).
C. Increasing oxygen to 70% is not appropriate, as the PaO2 level is within normal limits (93 mm Hg). The client's issue appears to be related more to ventilation (indicated by the elevated PaCO2) rather than oxygenation, so additional oxygen would not address the underlying cause and could lead to oxygen toxicity if used long-term.
D. A nonrebreather mask delivers a high concentration of oxygen, which is not necessary in this case since the client’s PaO2 is already adequate. The primary issue is not a lack of oxygen but rather the retention of CO2, so promoting ventilation and lung expansion through positioning and respiratory exercises is more appropriate.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is A
Explanation
A. Colonization - replicating microorganisms: not yet Infected
This pairing is correct. Colonization refers to the presence and replication of microorganisms on the wound surface. At this stage, the wound is not yet infected, as there may be microorganisms present, but they have not caused an inflammatory response or tissue damage.
B. Systemic infection - Wound is darker than the surrounding skin with noted drainage present
This description does not match the stage of systemic infection. Systemic infection refers to an infection that has spread beyond the initial wound site, affecting the entire body systemically. The symptoms of systemic infection may include fever, increased heart rate, malaise, and altered mental status. The description provided seems more indicative of a local infection with drainage.
C. Contaminated - infection beyond the wound
This pairing is incorrect. Contaminated wounds refer to wounds with a high risk of infection due to the presence of foreign material or significant contamination. However, contamination does not necessarily mean that an infection has already developed beyond the wound. It signifies a risk of infection but does not define the infection stage itself.
D. Local infection - sepsis
This pairing is incorrect. A local infection is confined to the wound site and may present with symptoms such as erythema, warmth, swelling, pain, and purulent drainage. Sepsis, on the other hand, is a severe systemic response to infection, characterized by widespread inflammation and organ dysfunction. Sepsis is not synonymous with a local infection; it represents a more advanced and life-threatening stage of infection.
Correct Answer is B
Explanation
A. Metabolic acidosis:
Metabolic acidosis is characterized by a low pH (<7.35) and a low bicarbonate level (<22 mEq/L) due to an excess of acids in the body or a loss of bicarbonate. However, in the given ABG values, the pH is low (7.22), but the bicarbonate level is elevated (28 mEq/L), which does not align with metabolic acidosis. Therefore, metabolic acidosis is not the correct interpretation in this case.
B. Respiratory acidosis:
Respiratory acidosis occurs when there is inadequate removal of carbon dioxide (CO2) by the lungs, leading to an accumulation of CO2 in the blood and a decrease in pH. In the ABG values provided, the pH is low (7.22), and the PaCO2 is elevated (68 mm Hg), indicating respiratory acidosis as the primary disturbance. This interpretation is supported by the elevated PaCO2 and the low pH, making it the correct choice based on the given data.
C. Respiratory alkalosis:
Respiratory alkalosis results from hyperventilation, leading to excessive elimination of CO2 and a decrease in PaCO2 levels. However, in the ABG values presented, the PaCO2 is elevated (68 mm Hg), which contradicts the expected decrease seen in respiratory alkalosis. Therefore, respiratory alkalosis is not the correct interpretation of the ABG values in this case.
D. Metabolic alkalosis:
Metabolic alkalosis is characterized by a high pH (>7.45) and a high bicarbonate level (>26 mEq/L) due to excessive loss of acids or an increase in bicarbonate levels. However, in the ABG values provided, the pH is low (7.22), and the bicarbonate level is elevated (28 mEq/L), which is not consistent with metabolic alkalosis. Therefore, metabolic alkalosis is not the correct interpretation based on the given data.
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